JP3422588B2 - Bicycle braking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to a brake device, and
Fixing pins extending from the pedestal provided on the turning frame
Wheel rim supported and driven by brake wire
The present invention relates to a brake device for pressing a brake shoe against a brake device. [0002] 2. Description of the Related Art For example, a mountain bike (MTB),
Off-road called All Terrain Bike (ATB)
Bicycles that can be driven must be equipped with a strong braking force.
Generally, a cantilever type brake device is mounted.
The cantilever type brake device is
Rotatable on front and rear forks or rear forks
Arm that is cantilevered and a brake arm
And a brake shoe fixed in the middle of the vehicle. B
The rake arm has one end pivotally supported by the frame.
And the other end is connected to a brake wire. Also blur
-The shoe is for bicycles in the middle of the brake arm
The wheel rim is disposed to face both sides. [0003] This cantilever type bicycle brake device
The brake wire by the brake lever
To rotate the brake arm in the closing direction,
-The shoe is pressed against the rim to apply braking. This
Una cantilever type brake device is caliper shake
Change shape according to the size of the bicycle like a parking device
There is no necessity, and the brakes are hardly effective
There is an advantage that a braking force can be obtained. However, a cantilever type brake device is
The brake shoe is turned on the horizontal surface by the rotation of the brake arm
When turning downward from the
When the rake shoe makes contact, the pressing force decreases. others
Adjust the relative mounting position between the side of the rim and the brake device.
It is necessary to make frequent adjustments, but this adjustment is difficult.
You. As a conventional technique for solving this problem, 4 resources
There is a link type brake device. This 4-link breaker
The key device is swingably supported by a fixing pin extending from the base.
Brake arm whose upper end is located outside the fixed pin
And pivotally supported in the middle of the brake arm
Output link and an output link rotatably connected to the output link.
Driven link extending downward and free to rotate
And inwardly connected to the fixing pin so that it cannot rotate.
And a stationary link. Output link
The brake shoe is attached in the middle of the brake. this
In the brake device, the brake arm is connected to the brake wire.
By rotating upward, the driven link rotates inward
Then, the output link moves horizontally or upward. This
And the brake shoe is horizontal or upward with respect to the rim side
And strong braking force can be obtained. [0006] In the above-mentioned conventional configuration,
The output link with the brake shoe attached
The arm is cantilevered, so brakes can be applied when braking.
When a reaction force is applied to the shoe, the reaction force causes the connected part to rattle.
May get twisted or twisted. Such a rattle
If braking, twisting or rattling occurs, powerful braking
Even with a 4-link configuration that can provide power,
The power escapes due to the torsion and the strong braking force cannot be maintained.
No. SUMMARY OF THE INVENTION It is an object of the present invention to provide a
-A bicycle brake device that presses against
To increase the rigidity of the link connection and maintain a strong braking force
To be able to do it. [0008] [Means for Solving the Problems]DepartureLight1Bicycles pertaining to
The rake device is mounted on the base of the bicycle frame.
Driven by brake wire, supported by extending fixed pins
Brake to press the brake shoe against the rim of the wheel
A pair of left and right brake arms and a pair of left and right brake arms.
Link member, a pair of left and right shoe mounting members, and a biasing member.
It has. The lower end of the brake arm is
Rotatably supported cantilever, upper end connected to brake wire
Are linked. The link member is a pair of brake arms
Are located inside each other, and the lower end pivots to the frame
It can be freely connected. The shoe attachment member is a link member
Of the upper end of the brake arm and the middle of the brake arm in the vertical direction.
Are connected rotatably and brake shoes can be attached
Noh. The biasing member has a pair of brake arms at its upper end.
The part is biased in the opening direction. And the brake arm and system
With the mounting member so that one sandwiches the other from both sides
The pair of left and right link members has a lower end
Firmly overlap the lower end of each brake arm in the front-rear direction.
Rotatable on link base mounted inside fixed pin
It is supported by. [0009]DepartureLight1In the bicycle brake device according to
Rotate the brake arm inward with the brake wire
Then, in the middle of the brake arm, put the brake arm on both sides
From both sides or on both sides with the brake arm
The shoe mounting members that are rotatably connected
Move inward. This shoe mounting member has a brake
The upper ends of the link members arranged side by side are connected
And the shoe mounting member is on the brake arm and the link member
Therefore, it is regulated to face horizontal or upward and moves inward
I do. And the brake shoe touches the rim side of the wheel
You. When the brake wire is loosened, the biasing member
The upper end of the rake arm rotates in the opening direction and the brake
It is released. Here, the shoe mounting member and the brake arm
Are connected so that one sandwiches the other from both sides
The rigidity of the connection between them is increased, and there is less backlash.
It becomes. Therefore, a strong braking force can be maintained. The link member is located inside the brake arm.
Are installed side by side, so the width dimension of the brake device is
Compact. [0011] 1 and 2 show one embodiment of the present invention.
The adopted bicycle brake device 1 is, for example, a front wheel brake device.
And presses against both side surfaces 5a of the rim 5 of the front wheel 2 for control.
To work. The brake device 1 is provided in front of the frame 3.
It is supported rotatably in the middle of the hook 4. Front fork 4
Are, for example, air-oil or elastomeric
Is a suspension fork that absorbs road impacts.
It can be collected. Front fork 4 is a pair of suspenders
Mounting part 4a and a pair of suspension parts 4a
To reinforce the mounting part 4b and the suspension part 4a
Brake arch 4c. Brake ar
The tip 4c has a substantially inverted U-shape divided into two branches.
The lower end is fixed in the middle of the suspension part 4a. The brake device 1 is provided on a handle 6.
Of the brake wire 10 extending from the brake lever 7
Connected to the department. The brake device 1 is shown in FIGS.
As shown in the figure, the inner wire 10b of the brake wire 10
A brake arm 12a fixed to the tip of the
Brake arm 1 arranged symmetrically with arm 12a
2b. On the upper end of the brake arm 12b
Only comes into contact with the outer wire 10a of the brake wire 10.
The connecting arm 11 extending inwardly is connected rotatably.
I have. Both brake arms 12a and 12b are located below the upper end.
Long S-shape curved in a bow shape outwardly convex and concave toward the end
Shape. Lower ends of brake arms 12a and 12b
Are connected to the fixing pins 13a and 13b as shown in FIG.
Through bases 14a and 14b (only 14a is shown).
It is movably supported. The following description includes the fixing pins 13a and 13b.
Is a symmetrical member, so in the following description
Only the members on the right side of FIG. 2 will be described, and the parts on the left side of FIG. 2 will be described.
Description of the material is omitted. 3 and 4.
As shown in the figure, provided on the inside of the lower end of the brake arch 4c.
Stepped pins projecting forward from the pedestal 15a. Table
As shown in FIG. 5, a fixing pin 1 is provided on the inner surface of the seat 15a.
Three holding holes 16 are formed on the same circumference around the axis of 3a.
a is formed up and down. This holding hole 16a is usually
Return spring of cantilever type brake device
This is a hole for adjusting the strength. As shown in FIG. 4, the fixing pin 13a has
The link base 14a is supported. Link Base 1
4a is arranged on the outer periphery of the fixing pin 13a, and the base end is fixed.
Cylindrical portion 17a in contact with step 13c of pin 13a
And a lock fitted and fixed to the outer periphery of the proximal end of the cylindrical portion 17a
Part 18a and a raindrop-shaped
And a camera section 19a. The cylindrical portion 17a is shaken.
The key arm 12a is rotatably supported. Locking part
Reference numeral 18a is a member having a substantially triangular shape as shown in FIG.
And penetrates any one of the holding holes 16a inside thereof.
A locking pin 20a is provided. This locking pin 20a
Through the holding hole 16a, the link base 14
The mounting position of “a” is maintained at a predetermined position. At the outer periphery of the link base 14a,
A spring is provided between the storage arm 12a and the locking portion 18a.
A gear receiver 21a is provided. Spring receiver 21a
Are arranged on the outer periphery with the groove 22a formed in the circumferential direction.
And an adjusting unit 23a (FIG. 5). In the groove 22a
Is wound around the base end of the return spring 24a.
Have been. The tip of the return spring 24a is upward
At the middle of the brake arm 12a on the rear side.
Is locked by a locking pin 25a (FIG. 3) projecting from
You. The return spring 24a is connected to the brake arm 12
a is urged to rotate outward. Adjustment unit 23a
Has a projection 26a formed on the outer periphery of the locking portion 18a.
An adjustment screw 27a that can be brought into contact with is screwed. this
Depending on the amount of adjustment screw 27a screwed in, the left and right brake
Adjust the posture of the arms 12a and 12b to
Shoe 30a, 30b (described later) and side surface 5a of rim 5
The gap can be adjusted. At the outer periphery of the link base 14a,
Between the storage arm 12a and the arm portion 19a.
Lock nuts 28a and 29a (FIG. 4) are screwed in.
You. The lock nuts 28a and 29a are connected to the brake arm 1
The movement of the shaft 2a in the axial direction is regulated. Fixing pin 1
At the tip of 3a, a mounting bolt 31a is fastened.
You. The mounting bolt 31a is connected to the shaft of the link base 14a.
The movement in the direction is suppressed. As shown in FIG. 2 and FIG.
A brake shoe 30 is provided at an intermediate portion of the
a for securing the a to the rear of the brake device 1.
The fixed link 32a is mounted substantially horizontally. Sh
-The fixed link 32a connects the two to the brake arm 12a.
It is rotatably connected by a penetrating mounting pin 33a.
You. The shoe fixing link 32a is shown in FIG.
U-shaped so as to sandwich both sides of the brake arm 12a
Arm mounting portion 34a formed in
and a shoe mounting portion 35a extending at a right angle from
You. Attach mounting pin 33a to arm mounting section 34a
A mounting hole 36a penetrating two U-shaped pieces for
A fixing hole 37a for fixing the holding pin 38a is formed.
Have been. Note that the support pin 38a is connected to an auxiliary phosphorus described later.
This is for supporting the hook 39a rotatably. this
So that the brake arm 12a is sandwiched
Connecting the fixed link 32a to the brake arm 12a
As a result, the rigidity of the connecting portion is increased, and the brake shoe 30
a, 30b can be prevented from escaping. Shoe mounting part
35a, it is long in the vertical direction (the direction of the depth of the page in FIG. 6).
An elongated shoe mounting hole 40a is formed. Take this shoe
As shown in FIG. 3, the elongated hole 40a is
0a and the step 13c of the fixing pin 13a.
The distance L is formed to be 25 mm or more. This
If the shoe mounting slot 40a is arranged at a position like
The moving center is closer to the center of the front fork 4 and is produced by the reaction force
The turning moment is small. For this reason, the front fork 4
Force acting on the brakes becomes weaker and the rigidity of the brake device increases.
You. The auxiliary link 39a is, as shown in FIG.
It is a flat member, the upper end of which is supported by a support pin 38a.
On the front surface of the arm attachment portion 34a of the shoe fixing link 32a
It is rotatably connected. 2 and FIG.
As shown in FIG. 4, it is attached to the tip of the arm 19a.
Can be freely rotated on the link base 14a by the support pin 41a.
It is connected to. It should be noted that the support pin is moved from the axis of the fixed pin 13a to the support pin.
Distance from the axis of 41a to the axis of the mounting pin 33a
The distance between the support pin 38a and the axis is equal. In addition,
Axes of support pins 38a arranged at both ends of auxiliary link 39a
Distance from the core to the axis of the support pin 41a and the fixed pin 13
The distance from the axis of a to the axis of the mounting pin 33a is equal to
No. That is, these four pins are the tops of a parallelogram.
Points between the pins.
Part of the rake arm 12a, link base 14a,
-By a part of the fixed link 32a and the auxiliary link 39a
A link mechanism is configured. For this reason, the shoe fixing
The link 32a is provided between the axis of the fixed pin 13a and the support pin 41a.
Move in parallel with the line segment connecting the axis of. The brake shoe 30a is, as shown in FIG.
, Is inserted into the shoe mounting slot 40a. brake
The shoe 30a is fixed to the shoe fixing pin 45a and the shoe.
A shoe holder 46a fixed to the tip of the pin 45a,
An elastic friction pad attached to the shoe holder 46a.
And a pad 47a. The shoe fixing pin 45a is
It is a round head bolt with a hexagonal hole.
a and between the shoe holder 46a and the shoe mounting portion 35a.
Is a convex washer having a convex surface that forms part of a spherical surface.
48a and a concave washer 49 having a concave surface engaging with the convex surface.
a are arranged. Here, the convex washer 48a and
And the recessed washer 49a
Fastening the brake shoe 30a in the long hole 40a
Then, the vertical position and inclination of the brake shoe 30a are adjusted by the rim 5.
Can be adjusted freely according to the position and inclination of the side surface 5a
You. Next, the operation of the above embodiment will be described.
You. When the driver operates the brake lever 7, the inside
The wire 10b is pulled into the outer wire 10a and the brake
The upper ends of the arms 12a and 12b are pulled inward, respectively.
Can be As a result, the brake arms 12a and 12b
The brake shoes 30a, 3 rotate in the closing directions respectively.
0b friction pads 47a, 47b are provided on the side 5a of the rim 5.
It is pressed and a braking action is performed. At this time, fix the shoe
Links 32a and 32b are auxiliary links 39a and
The horizontal posture is maintained by the action of the link mechanism including 39b.
And move inward. This is shown in FIGS. 7A and 7B.
Show. As a result, the friction pad 47 is surely secured to the rim 5.
a and 47b come into contact with each other to obtain a strong braking force.
You. These auxiliary links 39a, 39b
Since it is arranged inside 12a, 12b, the brake
The width dimension of the device 1 becomes compact. As a result,
The rake device 1 no longer protrudes from the front fork 4, for example.
Does not hit the legs during operation. In addition, friction pads
Even if a reaction force acts on the link bases 47a and 47b, the link base 14
a and 14b are in a predetermined posture by the locking pins 20a and 20b.
Therefore, sufficient braking force can be obtained. When the brake lever 7 is released, the brake
The rake wire 10 becomes loose and the return spring 24a,
24b allows the brake arms 12a and 12b to open
To the brake shoes 30a, 30b.
The tips of the doors 47a and 47b separate from the side surface 5a of the rim 5 and
The rake is released. [Other embodiments] (A) The brake shoe 30a is attached to the rear of the brake device 1.
Although arranged, it may be arranged at the front. (B) In the above embodiment, four pins are connected in parallel.
We placed them at the vertices of a quadrilateral, but these were
Position the brake shoes 30a, 30b
Change each length so that it follows the side 5a of the rim 5
May be. If the length is changed in this way, for example,
Sometimes the shoe fixing links 32a, 32b
It can be moved in any posture. (C) Replace the front fork with a rear fork.
The rake device 1 may be attached. [0026] 【The invention's effect】DepartureLight1The bicycle brake device according to
Means that one of the shoe mounting member and the brake arm
Because it is connected so as to sandwich it from both sides, the connection part of both
Has a higher rigidity and less rattling. For this reason,
Strong braking force can be maintained. Also, if the link member is
Since it is juxtaposed inside the key arm,
The dimensions in the width direction are compact.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front side view of a bicycle employing one embodiment of the present invention. FIG. 2 is a front view of the brake device. FIG. 3 is a side view of the brake device. FIG. 4 is a sectional view taken along line IV-IV of FIG. 3; FIG. 5 is a sectional view taken along line VV of FIG. 3; FIG. 6 is a sectional view taken along line VI-VI of FIG. 3; FIG. 7 is a schematic diagram showing an operation state of a brake. [Description of Signs] 1 Brake device 3 Frame 4 Front fork 10 Brake wires 12a, 12b Brake arms 13a, 13b Fixing pins 14a, 14b Link bases 15a, 15b Bases 24a, 24b Return springs 30a, 30b Brake shoes 32a, 32b Shoe fixing Links 39a, 39b Auxiliary links

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62L 1/14-1/16

Claims (1)

(57) Claims 1. A brake device supported by a fixing pin extending from a pedestal provided on a bicycle frame and driven by a brake wire to press a brake shoe against a wheel rim. A pair of left and right brake arms each having a lower end rotatably supported by the fixing pin and an upper end connected to the brake wire; and a lower end disposed inside each of the pair of brake arms. A pair of left and right link members whose portions are rotatably connectable to the frame; and an upper end portion of the link member and a vertically intermediate portion of the brake arm are rotatably connected to each other, and the brake shoe is A pair of left and right shoe mounting members that can be mounted, and a biasing member that biases the pair of brake arms in a direction in which upper ends thereof are opened, wherein the brake arm And the shoe mounting member are connected such that one sandwiches the other from both sides, and the left and right link members are fixed such that a lower end portion overlaps a lower end portion of each of the brake arms in the front-rear direction. A bicycle brake device rotatably supported by a link base attached to the inside of a pin.